U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 8376 - 8400 of 9859

Broadband Permittivity Measurements of High Dielectric Constant Films

March 1, 2006
Author(s)
Jan Obrzut, Nozaki R. AnopchenkoA
Our investigation concerns measuring broadband dielectric permittivity and loss tangent of thin film high dielectric constant (high-k) dielectric materials at microwave frequencies. The measurements are made in an APC-7 coaxial configuration where the test

Construction Object Identification from LADAR Scans: An Experimental Study Using I-Beams

December 15, 2005
Author(s)
David E. Gilsinn, Geraldine S. Cheok, Christoph J. Witzgall, Alan M. Lytle
Laser Scanning devices (LADAR for Laser Detection and Ranging) are used in construction projects to capture as-built data. They can rapidly generate large unstructured point clouds. This study describes an experiment in which an I-beam on a concrete floor

Fragility of Glass-Forming Polymer Liquids

October 4, 2005
Author(s)
J Dudowicz, Karl Freed, Jack F. Douglas
Many fluids exhibiting complex molecular structure or interactions solidify by glass-formation rather than crystallization. This tendency is especially prevalent in polymeric and biological systems where glass-formation is normal rather than exceptional

Combinatorial Synthesis and Dissolution Testing of Polyanhydride Copolymers

August 28, 2005
Author(s)
Brandon M. Vogel, Naomi Eidelman, Surya Mallapragada, Balaji Narasimhan
A linearly varying compositional library of 100 different polyanhydride randomcopolymers was designed, fabricated, and characterized within a few hours. A subset of this library was chosen and a substrate was designed and fabricated to enable the synthesis

Parallel Synthesis and Dissolution Testing of Polyanhydride Random Copolymers

June 16, 2005
Author(s)
Brandon M. Vogel, Naomi Eidelman, Balaji Narasimhan, Surya Mallapragada
A linearly varying compositional library of 100 different polyanhydride randomcopolymers was designed, fabricated, and characterized within a few hours. A subset of this library was chosen and a substrate was designed and fabricated to enable the synthesis

Characterization of a 2-D Pool Fire Simulator

January 1, 2005
Author(s)
P J. Disimile, John M. Davis
The current paper introduces a facility to be used for the investigation of fire suppressant transport and pool fire extinction in an environment similar to an aircraft engine nacelle. This work is done as part of an ongoing effort to develop a suppressant

Transport coefficients of the Lennard-Jones model fluid. III. Bulk viscosity

December 15, 2004
Author(s)
Karsten Meier, Arno D. Laesecke, Stephan Kabelac
In an extensive computer simulation study, the transport coefficients of the Lennard-Jones model fluid were determined with high accuracy from equilibrium molecular dynamics simulations. In the frame of time-correlation function theory, the generalized

Boltzmann Test of Slonczewski's Theory of Spin Transfer Torque

November 12, 2004
Author(s)
J Xiao, A Zangwill, Mark D. Stiles
We use a matrix Boltzmann equation formalism to test the accuracy of Slonczewski's theory of spin-transfer torque in thin-film heterostructures where a non-magnetic spacer layer separates two non-collinear ferromagnetic layers connected to non-magnetic

3D Cable-Based Cartesian Metrology System

December 31, 2003
Author(s)
R L. Williams, James S. Albus, Roger V. Bostelman
A novel cable-based metrology system is presented wherein six cables are connected in parallel from groundmounted string pots to the moving object or tool of interest. Cartesian pose can be determined for feedback control and other purposes by reading the

Expanding the Role of Finite State Machine Technology in Open Architecture Control

August 21, 2003
Author(s)
John L. Michaloski, Frederick M. Proctor, William G. Rippey, S Kolla
Modern machine control systems rely heavily on software to achieve system functionality. Until recently, control software?s primary purpose was to provide logic and sequencing of machine execution. With computer hardware now providing power and memory to

Monte Carlo Modeling of an Integrating Sphere Reflectometer

July 1, 2003
Author(s)
A Prokhorov, Sergey Mekhontsev, Leonard Hanssen
The Monte Carlo method has been applied to numerical modeling of an integrating sphere designed for hemispherical-directional reflectance factor measurements. It is shown that a conventional algorithm of inverse ray tracing used for estimation of

Report of Experimental Results for Tests 2,3, and 4 of the International Fire Model Benchmarking and Validation Exercise #3

July 1, 2003
Author(s)
Anthony P. Hamins, Michelle K. Donnelly, Erik L. Johnsson, Alexander Maranghides, George W. Mulholland
As part of its Fire Risk Research Program, the NRC (Nuclear Regulatory Commission) and NIST (National Institute of Standards and Technology) are participating in an International Collaborative Fire Model Project (ICFMP) to assess and validate fire computer

Toward a Real-time Scheduler and Controller for Semiconductor Fabrication Systems

April 1, 2003
Author(s)
Hyeung-Sik Min, Albert T. Jones, Yuehwern Yih
The complexity of a semiconductor fabrication system is high because of complicated product flows, uncertain operation times, variable yields, changing products, and evolving technologies. Effective scheduling, which attempts (1) to predict accurately the

Development and Validation of Corridor Flow Submodel for CFAST

November 1, 2002
Author(s)
J. L. Bailey, Glenn P. Forney, P. A. Tatem, Walter W. Jones
The modeling of fire and smoke spread is an evolving field. As knowledge is acquired and resources become available, models are enhanced to make their predictions more accurate and/or their computations faster. This paper will discuss the Consolidated Fire

Global Response Modification Factors vs. Member Ductility-Based Modifiers

July 1, 2002
Author(s)
S K. Kunnath, Hai S. Lew, D Friis
Most building structures today are designed using the response modification factors (R-factors) given in the code for different types of structural systems. This paper examines whether ductility-based modifiers for structural members (m-factors)

Value-Driven Behavior Generation for an Autonomous Mobile Ground Robot

April 5, 2002
Author(s)
Stephen B. Balakirsky, Alberto Lacaze
In this paper, we will describe a value-driven graph search technique that is capable of generating a rich variety of single and multiple vehicle behaviors. The generation of behaviors depends on cost and benefit computations that may involve terrain

Radiometry of Low-Pressure Hg-Ar Discharges

August 1, 2001
Author(s)
Craig J. Sansonetti, Joseph Reader
New fluorescent lamp designs employ Hg-Ar discharges under operating conditions that differ significantly from those found in conventional fluorescent tubes. We have studied the radiant output of Hg-Ar discharges over a wide range of Ar pressure, Hg vapor
Displaying 8376 - 8400 of 9859
Was this page helpful?